I think everyone kinda drifts about looking for their friend circle in first year.
Hmm.. well you sound a bit like me coz I don't really go clubbing, and as an alternative I go shopping, go to the cinema, ice skating, dinners etc
I guess you have to just put it out there really like: so what are you doing this weekend? And if they say nothing much, or really anything! - just say: oh I'm just going for a movie care to join?
It's just simple things like that that start off a friendship really.